- cloud tops
- 0.58 g
- sun
- 6.0× wider
- sky
- bright white
Illustration computed from this world’s measured and derived values, not a photograph.
HD 148797 b
HD 148797 b is a confirmed gas-giant exoplanet 562 ly from Earth in the constellation Norma, discovered in 2026 by Transiting Exoplanet Survey Satellite (TESS).
Transit: spotted by the tiny, repeating dip in its star’s light each time the planet crosses in front of it (what that means).
HD 148797 b is a giant ball of gas with no solid surface to stand on; you would simply sink into ever-thicker cloud. Its yellow-white star looks 6.0× wider than ours, bathing the cloud tops in bright white light. A year passes in just 42 days, and at an estimated 489°C (912°F) it is furnace-hot.
HD 148797 b has no solid surface, so its gravity is the pull at the cloud tops, and it is excluded from surface-gravity rankings.
Calculate your exact weight on HD 148797 b →How closely this world matches Earth in size and warmth, from 0 to 1 (Earth = 1.0). Computed by gravityfinder. See every world ranked →
What these mean: surface gravity · tidal locking · equilibrium temperature · Earth similarity
If your children grew up herea playful thought experiment
There is no ground here to grow up on, only bottomless sky. A child could never stand, walk, or even fall to a surface, because there isn't one. Under 0.6 times Earth's gravity and pressure that only climbs the deeper you go, anything built for this world would not look human at all: picture something closer to a deep-sea creature than a person, broad and buoyant, drifting through the cloud decks with no need for legs and no floor to land on.
- Body plan
- Floating, not upright
- With no surface and no fixed up or down, a skeleton built for standing would be useless; a drifting, gas-filled body would not.
- Build
- Broad and pressure-hardened
- Pressure rises without limit toward the interior, so anything alive would have to be built like a deep-sea animal, not a land one.
A playful thought experiment from this world’s gravity, not a prediction about any real person. No human has ever grown up off Earth, so no one truly knows; the direction (taller in low gravity, shorter and stockier in high) follows how growing bodies respond to weight.
Hear how a voice sounds herea computed acoustic demoEXPERIMENTAL · just for fun
Your voice would sound a thin, helium-fast squeak.
There is no surface to stand on; this is the sound at the cloud tops, where the air is mostly hydrogen and helium, the lightest gases there are. Sound races through them at about 1,964 metres per second, 5.8 times its Earth speed, flipping a voice into a thin, cartoon-helium squeak. The temperature behind that number is this world's computed equilibrium temperature; its real atmosphere is unknown. The demo plays the shift capped at 1.8x; the real effect would be even stronger.
A real voice sample, pitch-shifted (tempo held constant) to suggest the acoustics: a playful approximation, not a precise simulation. Voice: Lingua Libre / Vealhurl, CC BY-SA 4.0.
- !Furnace-hot at around 489°C (912°F), with no liquid water and no shade anywhere.
- !There is nowhere to land: no ground, no deck, only cloud that thickens into crushing pressure.
- !Its star delivers about 58 times the sunlight Earth gets, a blinding, sterilizing glare.
- !Earth-similarity index 0.16: this world has almost nothing in common with our own.
A playful read of HD 148797 b’s measured and computed values, not a real advisory.
How long to get there · 562 ly awayCALCULATED
Zoom out: star → system → (soon) galaxy arm, host black hole, and a real image of the host galaxy.
Matched telescope & eyepiece recommendations are coming. Any product links will carry a clear affiliate disclosure.
What is the gravity on HD 148797 b?
HD 148797 b is a gas giant with no solid surface to stand on. At its cloud tops, gravity pulls about 0.58 times as hard as Earth's.
How far is HD 148797 b from Earth?
HD 148797 b lies about 562 light-years from Earth.
How long would it take to get to HD 148797 b?
At the speed of NASA's Parker Solar Probe, the fastest craft ever built, the journey would take about 876,825 years.
How hot is HD 148797 b?
HD 148797 b's equilibrium temperature, the balance it reaches from its star's light alone before any greenhouse warming, is about 489°C (912°F).
How long is a year on HD 148797 b?
HD 148797 b completes one orbit of its star in 42 days.
Illustration generated from HD 148797 b's confirmed parameters, not a photograph.